19855804 has 12 divisors (see below), whose sum is σ = 34779528. Its totient is φ = 9918800.

The previous prime is 19855793. The next prime is 19855819. The reversal of 19855804 is 40855891.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5874 + ... + 8614.

It is an arithmetic number, because the mean of its divisors is an integer number (2898294).

Almost surely, 2^19855804 is an apocalyptic number.

It is an amenable number.

19855804 is a deficient number, since it is larger than the sum of its proper divisors (14923724).

19855804 is a wasteful number, since it uses less digits than its factorization.

19855804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4556 (or 4554 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 40.

The square root of 19855804 is about 4455.9851884853. The cubic root of 19855804 is about 270.7878406482.

The spelling of 19855804 in words is "nineteen million, eight hundred fifty-five thousand, eight hundred four".